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AWS Certified Solutions Architect - Professional · AWS
Select 2 answers.
This question asks for 2 answers, but our data marks only 1. Compare with the community discussion below for the full answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
For those choosing A, at what point does a database initiate the network call first before the application? It's always the application the first to initiate the network call so EC2 -> Outbound SG - >DB and DB <- Inbound <- EC2
B: Allows EC2 to send traffic to Aurora over the correct port — outbound rule. C: Allows Aurora to receive traffic from EC2 — inbound rule. Together, these provide least privilege access, only enabling the EC2 instances to initiate DB connections over the required port.
BC. The steps are clearly stated here: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/tutorial-ec2-rds-option3.html#option3-task3-connect-rds-database-to-ec2-instance